For an owner considering a new service, product or business.
01Separate the appealing idea from the assumptions
Write who has the problem, what they currently do, what would improve, who can authorize a purchase and how the proposed work could be delivered. Mark each statement as observed, inferred or unknown. A customer describing frustration is evidence of an experience; it is not automatically evidence that they will switch to your proposed solution.
Steve Blank explicitly includes new ideas inside established companies in his discussion of hypothesis-led experimentation.1 Existing customer relationships can help a team learn, but they do not turn an unfamiliar offering into a proven business model. Preserve that distinction in the first planning document.
02Find the assumption that could stop the idea
The most important uncertainty may concern the problem, the decision-maker, willingness to change, access to customers or the ability to deliver. Ask which unsupported assumption would make the venture unattractive even if the others were true. That is a better starting point than building the easiest feature.
In a service idea, the team might already know how to perform the work but not who owns the customer’s decision. In a product idea, the user may like it while an internal approver cannot authorize the change. Name the relationship between user, buyer and affected people before deciding what kind of evidence would count.
Turn enthusiasm into a decision
Assumption
What must be true?
Exposure
What fails if it is wrong?
Experiment
What observation can challenge it?
Decision
Your call: continue, revise or stop; name the next owner
03Choose a test that can produce an unwelcome answer
A problem interview, a walkthrough of an accurately labelled concept or a limited manually delivered trial tests different things. Match the method to the uncertainty. A demo can reveal comprehension problems without proving demand. A booked discussion shows more interest than a compliment but is still different from a permitted commercial commitment.
Write the observation that would lead to continuing, revising or stopping before running the test. Avoid shifting that standard after a promising conversation. Record refusals and nonresponses with their context; do not erase them from the account of what happened. Keep the test within the team’s actual authority and delivery capacity.
04An illustrative opportunity test
Imagine a maintenance company considering a coordination service for small property teams. The initial guess is that customers struggle to arrange several providers. Conversations may reveal that scheduling is inconvenient but procurement approval is the real obstacle. A scheduling prototype would test the wrong assumption.
A better next step could examine a recent coordination episode and the people who had to approve it. If the supposed buyer does not control the decision, the venture brief changes before a product is built. This illustration is not a market finding; it shows how a test can prevent an attractive interpretation from hardening into a plan.
05Buy the next piece of information
At review, ask what changed and what remains unknown. A useful result may justify another limited test rather than a launch. Record the next owner, the time and resources the test is allowed to consume and the event that ends it. Momentum should come from decisions that land, not an expanding list of unfinished experiments.
Some opportunities cannot be tested meaningfully without substantial development or specialist clearance. Say so and assess that commitment directly. A small prototype should not create false confidence about safety, licensing, commercial feasibility or delivery. Use the worksheet to make the uncertainty explicit enough that evidence could change your mind.
One opportunity test card
Choose the uncertainty that most affects whether to proceed. This is a planning aid, not investment advice.
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Sources and limits
Source pages checked 10 October 2026 UTC. The worksheets are editorial aids; they have not been validated as predictive assessments.
- Steve Blank · Why Build, Measure, Learn isn’t just throwing things against the wall. 6 May 2015; checked 10 October 2026. Author’s methodological essay. Supports explicit hypotheses and experiments, including ideas inside established companies. It does not validate an opportunity or predict success.
Our interest
Heritage is taking first conversations about paid advisory work on growth. This guide is not an offer from Heritage. You can use this guide and its worksheet independently, without engaging Heritage.
Service work, The Read included, is a separate relationship: if we become interested in buying a business we are working with, we stop that work and tell the owner plainly before any purchase discussion begins.
This article is educational. It is not individual legal, tax or investment advice, an offer or a promise of results.
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